Home / 28,909.20-39,905.73-18,840.12

Finding the Fourth Proportional to 28,909.20, 39,905.73 and 18,840.12

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Solution

The fourth proportional to 28,909.20, 39,905.73 and 18,840.12 is: 26,006.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.20 : 39,905.73 = 18,840.12 : x
  2. Step 2: Convert to fraction form
    28,909.20/39,905.73 = 18,840.12/x
  3. Step 3: Cross multiply
    28,909.20x = 39,905.73 × 18,840.12
  4. Step 4: Simplify right side
    28,909.20x = 751,828,741.89
  5. Step 5: Solve for x
    x = 751,828,741.89/28,909.20
  6. Step 6: Final answer
    x = 26,006.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.